Auto Level
Auto level is an optical instrument which is used in along with a levelling staff to establish the relative heights levels of objects or marks. It is widely used in surveying and construction to measure height differences and heights of known objects or marks. It is also useful in construction of roads, to calculate CUT & FILL in a road project, deciding slope on side for draining purpose. It was invented by an English Civil engineer, William Gravatt in 1832. Continue reading “Auto Level”
Odometer
An odometer is an instrument used to calculate the distance from one position to another while carrying out the survey of an area. It was created in 1755 by Ben Franklin, who was a writer as well as a postman, to analyse the best routes for delivering his mail. Continue reading “Odometer”
Spirit Level
Spirit Level was invented by a French scientist named Melchisedech Thevenot on 2nd February 1661
A spirit level is designed to indicate whether a surface is level on the horizontal or vertical planes. Continue reading “Spirit Level”